I need the first sentence of my captions to appear on its own line in a \large, bold font. I also need to same document to easily produce standard captions (all same font, no line breaks). I have implemented a class file that uses an option to directly modify \@caption and add the necessary formatting; however, my code isn't quite working. This example correctly places the first sentence of the caption on its own line in the correct font, but the text is not left-aligned.